<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <link href="style.less" rel="stylesheet/less">
    <script src="less.min.js"></script>
    <title>Title</title>
</head>
<body>
<div id="wrap"></div>
<div class="wrap"></div>
<div class="wrap wrap-img"></div>
<div class="mydiv"></div>
<div class="div1">这里是变量运算的演示</div>
<div class="div2">这里是变量套用的演示</div>
<div class="div3">
    <div class="div3_content"></div>
</div>
</body>
</html>